relay vs circuit

relay and circuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
relay	Yes	No	Yes	No
circuit	Yes	No	Yes	No

relay (noun)	circuit (noun)
the act of passing something along from one person or group to another	a journey or route all the way around a particular place or area
electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit	movement once around a course
a race between teams; each member runs or swims part of the distance	an electrical device that provides a path for electrical current to flow
a crew of workers who relieve another crew	a racetrack for automobile races
a fresh team to relieve weary draft animals	(law) a judicial division of a state or the United States (so-called because originally judges traveled and held court in different locations); one of the twelve groups of states in the United States that is covered by a particular circuit court of appeals
	an established itinerary of venues or events that a particular group of people travel to
	the boundary line encompassing an area or object

relay (verb)	circuit (verb)
pass along	make a circuit
control or operate by relay